Operating head eor pumps



' stroke. yIt has been Patented Dec. 22, 1925. i

UNITED STATE Sil PATENT oF Fics.

OPERATING HEAD ron'ruivrrs.

Appiiation inea April 15, 19725. serial No. 23,257.

To @ZZ 'whom it may concern:

Beitknown that I, JOHN T. PHiPPs, a citizen of the United States, and resident of Huntington Park, in the county o-f Los Angeles, State of California, have invented new and useful Improvements in Operating Heads for Pumps, of which the following is a specification.

This invention relates to an operating head for reciprocating pumps and is especially adapted for deep well pumps. The weight of sucker rods, depending parts, and the column of lioiuid on deep wells such as oil wells is of such magnitude that the change in the direction of movement at the end of the down stroke must be gentle, and, it is preferable that there be a period of rest so that the parts may settle before the return stroke. since gravity acts against the load being carried, it is preferable that the change in direction be as quick as possible in order to increase eiiiciency. Another important factoi' in pumping oil wells is the length of found that the production of oil wells is increased by increasing the pump stroke. To the end that a long stroke may be attained with a minimum of change in the machinery now employed, it is desirable that a straight movement operating head be provided. U

The primary object of this invention .is to provide an operating head which will convert the rotary motion of an engine into the reciprocating motion of a pump, and

' wherein the motion of the pump may be designed to produce the result above mentioned.

These objects together with other objects and corresponding accomplishments are obtained by means of the embodiment of niy invention illustrated in the accompanying drawing, in which:

Fig. 1 is an elevation of the upper end of a deep well pump, with my operating head mounted thereon; Fig. 2 is a section as s een on the line 2-2 of Fig. 1; and Fig. 3 is a section as seen on the line 3-3 of Fig. 1 showing a fragment of the structure.v

Referring more ing, 5 indicates a well casing within which is mounted the pump tubing 6. vThe sucker ifod is indicated by 7.

Mounted upon a head 8 or any other suitable structnre is a frame 9 having vertically disposed slide rods ,10, Mounted so as to At the en'd of the up stroke,

particularly to the draw? be reciprocated upon the Arods 10 is a carriage 11 to which the suckerrods 7 are at.v

tached. There is formed in one face of the carriage plate a channel of endless shape having teeth 12 on the outer wally thereof.

This recess is of triangular shape havingV a flat upper side or base and an apex at the lower end. Back of the channel is a recess 13 of corresponding shape. This recessis to receive the stub `end of a shaft. Intermedil atethe bottom and top of the frame is a bridge 14 having rails 15 at the top thereof, upon which is slidably mounted a block 16. Journalle'd upon block 16 is a shaft 17, upon the stub end of which is mounted a roller riding in recess 13. Fixed to the shaft is a pinion 18 connected with the teeth 12. l

The shaft 17 is connected to a shaft 19 by means of a universal joint 20, and shaft 19. may be connected through a universal Joint 21 and other well known mechanical means to a drive pulley shaft 22, the pulley being indicated by 23. Pulley 23 is suitably geared to a source of power.

It will be obvious that rotation of the pulley 23 will convey rotary motion to the shaft 17. This causes the pinion 18 to be rotate-d and the carriage 11 to be correspondingly' reciprocated. The pinion is maintained in mesh with the teeth 12 on the carriage by.

reason of the stub end of shaft 17 being guided in the recess 13.

There is an even uniform feed of the carriage from the apex to the base of the triangle. A uniform speed of the down stroke yis imparted to the sucker rods, column of liquid, and other parts. The stroke is finished when the pinion reaches the baseof the triangle. At this point reciprocatory movement ceases, and a period of rest occurs while the pini-on is moving'to the opposite leg of the triangle. This periodpermits all of the parts and the column of oil to settle. Thereupon, the carriage starts to move in the opposite direction on the up stroke. Thus, there is a period of rest at one end of the stroke which may be made as long as desirable, and a quickchange in direction at the other end of the stroke.

What I claim isz.

1. In a reciprocating' operating mechanism of the character described, the combination ofa frame, a carriagemounted to be reciprocated therein, said carriage having an endless internally toothed track rovided at one end with a substantially iijo ' 'straiglit"portion"transverse ytofthe path-'of the reciprocation of said carrage,-and-aW laterally sldabledriving;l gear inengage nientV With said track.

2. ln a reciprocating operatin'gaf;mecha:n

nis'm of the character described, thev c0m rhina-tion of a frame, a'carraglmnnntedfto' be recprccated therein, Asaid Vcarriage having transverse gndeway on said frame, a clock slidably. mounted on said guideway, and a driving Sha-ft"juriall'edb cn Said block and havin-gffamgear thereon in engagement with said track.

In Wtnessfthat I clann the foregoing I have hereunto subscribed my name this 107th day of April, 1925;- l Y l Y JOHN Tf. l'HiPPS.

the-pathiof rec'i'procation ofv saidcarriage, a Y 

